public abstract class Graph {
    private double perimeter;
    private double area;
    public Graph(){

    }
    public Graph(double perimeter,double area){
        this.perimeter = perimeter;
        this.area = area;
    }
    public void setPerimeter(double perimeter){
        this.perimeter = perimeter;
    }
    public double getPerimeter(){
        return perimeter;
    }
    public void setArea(double area){
        this.area = area;
    }
    public double getArea(){
        return area;
    }
    public abstract void are
}
